Portion of a shoe upper



FIG. 1 is a perspective view of a portion of a shoe upper showing my new design;

FIG. 2 is a second perspective view thereof; and,

FIG. 3 is a side view thereof.

The uneven broken line showing of the generally quadrilaterally-shaped feature in the shaded area forms no part of the claimed design. The uneven broken line immediately adjacent to the shaded area represents an unclaimed boundary of the design. The uneven broken line showing of the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe upper, as shown and described. 